The patch titled
Subject: cma: count free CMA pages
has been added to the -mm tree. Its filename is
cma-count-free-cma-pages.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Subject: cma: count free CMA pages
Add NR_FREE_CMA_PAGES counter to be later used for checking watermark in
__zone_watermark_ok(). For simplicity and to avoid #ifdef hell make this
counter always available (not only when CONFIG_CMA=y).
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: Michal Nazarewicz <mina86@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mmzone.h | 1 +
include/linux/vmstat.h | 8 ++++++++
mm/page_alloc.c | 26 +++++++++++++++++++-------
mm/page_isolation.c | 5 +++--
mm/vmstat.c | 1 +
5 files changed, 32 insertions(+), 9 deletions(-)
diff -puN include/linux/mmzone.h~cma-count-free-cma-pages include/linux/mmzone.h
--- a/include/linux/mmzone.h~cma-count-free-cma-pages
+++ a/include/linux/mmzone.h
@@ -142,6 +142,7 @@ enum zone_stat_item {
NUMA_OTHER, /* allocation from other node */
#endif
NR_ANON_TRANSPARENT_HUGEPAGES,
+ NR_FREE_CMA_PAGES,
NR_VM_ZONE_STAT_ITEMS };
/*
diff -puN include/linux/vmstat.h~cma-count-free-cma-pages include/linux/vmstat.h
--- a/include/linux/vmstat.h~cma-count-free-cma-pages
+++ a/include/linux/vmstat.h
@@ -253,6 +253,14 @@ static inline void refresh_zone_stat_thr
#endif /* CONFIG_SMP */
+static inline void __mod_zone_freepage_state(struct zone *zone, int nr_pages,
+ int migratetype)
+{
+ __mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages);
+ if (is_migrate_cma(migratetype))
+ __mod_zone_page_state(zone, NR_FREE_CMA_PAGES, nr_pages);
+}
+
extern const char * const vmstat_text[];
#endif /* _LINUX_VMSTAT_H */
diff -puN mm/page_alloc.c~cma-count-free-cma-pages mm/page_alloc.c
--- a/mm/page_alloc.c~cma-count-free-cma-pages
+++ a/mm/page_alloc.c
@@ -557,7 +557,8 @@ static inline void __free_one_page(struc
if (page_is_guard(buddy)) {
clear_page_guard_flag(buddy);
set_page_private(page, 0);
- __mod_zone_page_state(zone, NR_FREE_PAGES, 1 << order);
+ __mod_zone_freepage_state(zone, 1 << order,
+ migratetype);
} else {
list_del(&buddy->lru);
zone->free_area[order].nr_free--;
@@ -676,6 +677,8 @@ static void free_pcppages_bulk(struct zo
/* MIGRATE_MOVABLE list may include MIGRATE_RESERVEs */
__free_one_page(page, zone, 0, mt);
trace_mm_page_pcpu_drain(page, 0, mt);
+ if (is_migrate_cma(mt))
+ __mod_zone_page_state(zone, NR_FREE_CMA_PAGES, 1);
} while (--to_free && --batch_free && !list_empty(list));
}
__mod_zone_page_state(zone, NR_FREE_PAGES, count);
@@ -691,7 +694,7 @@ static void free_one_page(struct zone *z
__free_one_page(page, zone, order, migratetype);
if (unlikely(migratetype != MIGRATE_ISOLATE))
- __mod_zone_page_state(zone, NR_FREE_PAGES, 1 << order);
+ __mod_zone_freepage_state(zone, 1 << order, migratetype);
spin_unlock(&zone->lock);
}
@@ -814,7 +817,8 @@ static inline void expand(struct zone *z
set_page_guard_flag(&page[size]);
set_page_private(&page[size], high);
/* Guard pages are not available for any usage */
- __mod_zone_page_state(zone, NR_FREE_PAGES, -(1 << high));
+ __mod_zone_freepage_state(zone, -(1 << high),
+ migratetype);
continue;
}
#endif
@@ -1140,6 +1144,9 @@ static int rmqueue_bulk(struct zone *zon
}
set_page_private(page, mt);
list = &page->lru;
+ if (is_migrate_cma(mt))
+ __mod_zone_page_state(zone, NR_FREE_CMA_PAGES,
+ -(1 << order));
}
__mod_zone_page_state(zone, NR_FREE_PAGES, -(i << order));
spin_unlock(&zone->lock);
@@ -1411,7 +1418,7 @@ int capture_free_page(struct page *page,
mt = get_pageblock_migratetype(page);
if (unlikely(mt != MIGRATE_ISOLATE))
- __mod_zone_page_state(zone, NR_FREE_PAGES, -(1UL << order));
+ __mod_zone_freepage_state(zone, -(1UL << order), mt);
if (alloc_order != order)
expand(zone, page, alloc_order, order,
@@ -1515,7 +1522,8 @@ again:
spin_unlock(&zone->lock);
if (!page)
goto failed;
- __mod_zone_page_state(zone, NR_FREE_PAGES, -(1 << order));
+ __mod_zone_freepage_state(zone, -(1 << order),
+ get_pageblock_migratetype(page));
}
__count_zone_vm_events(PGALLOC, zone, 1 << order);
@@ -2889,7 +2897,8 @@ void show_free_areas(unsigned int filter
" unevictable:%lu"
" dirty:%lu writeback:%lu unstable:%lu\n"
" free:%lu slab_reclaimable:%lu slab_unreclaimable:%lu\n"
- " mapped:%lu shmem:%lu pagetables:%lu bounce:%lu\n",
+ " mapped:%lu shmem:%lu pagetables:%lu bounce:%lu\n"
+ " free_cma:%lu\n",
global_page_state(NR_ACTIVE_ANON),
global_page_state(NR_INACTIVE_ANON),
global_page_state(NR_ISOLATED_ANON),
@@ -2906,7 +2915,8 @@ void show_free_areas(unsigned int filter
global_page_state(NR_FILE_MAPPED),
global_page_state(NR_SHMEM),
global_page_state(NR_PAGETABLE),
- global_page_state(NR_BOUNCE));
+ global_page_state(NR_BOUNCE),
+ global_page_state(NR_FREE_CMA_PAGES));
for_each_populated_zone(zone) {
int i;
@@ -2938,6 +2948,7 @@ void show_free_areas(unsigned int filter
" pagetables:%lukB"
" unstable:%lukB"
" bounce:%lukB"
+ " free_cma:%lukB"
" writeback_tmp:%lukB"
" pages_scanned:%lu"
" all_unreclaimable? %s"
@@ -2967,6 +2978,7 @@ void show_free_areas(unsigned int filter
K(zone_page_state(zone, NR_PAGETABLE)),
K(zone_page_state(zone, NR_UNSTABLE_NFS)),
K(zone_page_state(zone, NR_BOUNCE)),
+ K(zone_page_state(zone, NR_FREE_CMA_PAGES)),
K(zone_page_state(zone, NR_WRITEBACK_TEMP)),
zone->pages_scanned,
(zone->all_unreclaimable ? "yes" : "no")
diff -puN mm/page_isolation.c~cma-count-free-cma-pages mm/page_isolation.c
--- a/mm/page_isolation.c~cma-count-free-cma-pages
+++ a/mm/page_isolation.c
@@ -77,11 +77,12 @@ int set_migratetype_isolate(struct page
out:
if (!ret) {
unsigned long nr_pages;
+ int mt = get_pageblock_migratetype(page);
set_pageblock_isolate(page);
nr_pages = move_freepages_block(zone, page, MIGRATE_ISOLATE);
- __mod_zone_page_state(zone, NR_FREE_PAGES, -nr_pages);
+ __mod_zone_freepage_state(zone, -nr_pages, mt);
}
spin_unlock_irqrestore(&zone->lock, flags);
@@ -100,7 +101,7 @@ void unset_migratetype_isolate(struct pa
if (get_pageblock_migratetype(page) != MIGRATE_ISOLATE)
goto out;
nr_pages = move_freepages_block(zone, page, migratetype);
- __mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages);
+ __mod_zone_freepage_state(zone, nr_pages, migratetype);
restore_pageblock_isolate(page, migratetype);
out:
spin_unlock_irqrestore(&zone->lock, flags);
diff -puN mm/vmstat.c~cma-count-free-cma-pages mm/vmstat.c
--- a/mm/vmstat.c~cma-count-free-cma-pages
+++ a/mm/vmstat.c
@@ -722,6 +722,7 @@ const char * const vmstat_text[] = {
"numa_other",
#endif
"nr_anon_transparent_hugepages",
+ "nr_free_cma",
"nr_dirty_threshold",
"nr_dirty_background_threshold",
_
Patches currently in -mm which might be from b.zolnierkie@xxxxxxxxxxx are
mm-fix-tracing-in-free_pcppages_bulk.patch
mm-fix-tracing-in-free_pcppages_bulk-fix.patch
cma-fix-counting-of-isolated-pages.patch
cma-count-free-cma-pages.patch
cma-count-free-cma-pages-fix.patch
cma-fix-watermark-checking.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
